Bluetooth wireless technology has become an essential part of our modern society. Mobile phones, game controllers, Personal Digital Assistant (PDAs), computers and various electronic gadgets have adapted Bluetooth and made it a popular technology for short range wireless communication. However, as the Bluetooth technology becomes widespread, it has shifted from short range and can now even have long range communication greater than WLANs with the help of extended antennas and so the vulnerabilities in its security protocols have also increased which can be potentially dangerous to the privacy of a user's personal information. The security issues of Bluetooth has been an active area of research for the past few years. This book presents some vulnerabilities of this technology and proposes some countermeasures. It also provides some tips that end-users can implement immediately to become more cautious about their private information. A fairly new concept is also introduced in this book which uses a secure Bluetooth networking technology in a public environment to enable social networking between multiple users who do not have access to the internet.